package controller;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.io.IOException;

//@WebFilter("/*")
public class LoginFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest) servletRequest;
        HttpSession session=request.getSession();
        //获取用户想访问的路径
        String path=request.getRequestURI().toString();
        if(path.contains("login"))
             filterChain.doFilter(servletRequest,servletResponse);
        else
            if(session.getAttribute("username")!=null)
                filterChain.doFilter(servletRequest,servletResponse);


    }

    @Override
    public void destroy() {

    }
}
